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"""List firewalls."""
# :license: MIT, see LICENSE for more details.
import os
import subprocess
import tempfile
import click
import SoftLayer
from SoftLayer.CLI import environment
from SoftLayer.CLI import exceptions
from SoftLayer.CLI import firewall
from SoftLayer.CLI import formatting
DELIMITER = "=========================================\n"
def parse_rules(content=None):
"""Helper to parse the input from the user into a list of rules.
:param string content: the content of the editor
:returns: a list of rules
"""
rules = content.split(DELIMITER)
parsed_rules = []
order = 1
for rule in rules:
if rule.strip() == '':
continue
parsed_rule = {}
lines = rule.split("\n")
parsed_rule['orderValue'] = order
order += 1
for line in lines:
if line.strip() == '':
continue
key_value = line.strip().split(':')
key = key_value[0].strip()
value = key_value[1].strip()
if key == 'action':
parsed_rule['action'] = value
elif key == 'protocol':
parsed_rule['protocol'] = value
elif key == 'source_ip_address':
parsed_rule['sourceIpAddress'] = value
elif key == 'source_ip_subnet_mask':
parsed_rule['sourceIpSubnetMask'] = value
elif key == 'destination_ip_address':
parsed_rule['destinationIpAddress'] = value
elif key == 'destination_ip_subnet_mask':
parsed_rule['destinationIpSubnetMask'] = value
elif key == 'destination_port_range_start':
parsed_rule['destinationPortRangeStart'] = int(value)
elif key == 'destination_port_range_end':
parsed_rule['destinationPortRangeEnd'] = int(value)
elif key == 'version':
parsed_rule['version'] = int(value)
parsed_rules.append(parsed_rule)
return parsed_rules
def open_editor(rules=None, content=None):
"""Helper to open an editor for editing the firewall rules.
This method takes two parameters, if content is provided,
that means that submitting the rules failed and we are allowing
the user to re-edit what they provided. If content is not provided, the
rules retrieved from the firewall will be displayed to the user.
:param list rules: A list containing the rules of the firewall
:param string content: the content that the user provided in the editor
:returns: a formatted string that get be pushed into the editor
"""
# Let's get the default EDITOR of the environment,
# use nano if none is specified
editor = os.environ.get('EDITOR', 'nano')
with tempfile.NamedTemporaryFile(suffix=".tmp") as tfile:
if content:
# if content is provided, just display it as is
tfile.write(content)
tfile.flush()
subprocess.call([editor, tfile.name])
tfile.seek(0)
data = tfile.read()
return data
if not rules:
# if the firewall has no rules, provide a template
tfile.write(DELIMITER)
tfile.write(get_formatted_rule())
else:
# if the firewall has rules, display those to the user
for rule in rules:
tfile.write(DELIMITER)
tfile.write(get_formatted_rule(rule))
tfile.write(DELIMITER)
tfile.flush()
subprocess.call([editor, tfile.name])
tfile.seek(0)
data = tfile.read()
return data
def get_formatted_rule(rule=None):
"""Helper to format the rule into a user friendly format.
:param dict rule: A dict containing one rule of the firewall
:returns: a formatted string that get be pushed into the editor
"""
rule = rule or {}
return ('action: %s\n'
'protocol: %s\n'
'source_ip_address: %s\n'
'source_ip_subnet_mask: %s\n'
'destination_ip_address: %s\n'
'destination_ip_subnet_mask: %s\n'
'destination_port_range_start: %s\n'
'destination_port_range_end: %s\n'
'version: %s\n'
% (rule.get('action', 'permit'),
rule.get('protocol', 'tcp'),
rule.get('sourceIpAddress', 'any'),
rule.get('sourceIpSubnetMask', '255.255.255.255'),
rule.get('destinationIpAddress', 'any'),
rule.get('destinationIpSubnetMask', '255.255.255.255'),
rule.get('destinationPortRangeStart', 1),
rule.get('destinationPortRangeEnd', 1),
rule.get('version', 4)))
@click.command(cls=SoftLayer.CLI.command.SLCommand, )
@click.argument('identifier')
@environment.pass_env
def cli(env, identifier):
"""Edit firewall rules."""
mgr = SoftLayer.FirewallManager(env.client)
firewall_type, firewall_id = firewall.parse_id(identifier)
if firewall_type == 'vlan':
orig_rules = mgr.get_dedicated_fwl_rules(firewall_id)
else:
orig_rules = mgr.get_standard_fwl_rules(firewall_id)
# open an editor for the user to enter their rules
edited_rules = open_editor(rules=orig_rules)
env.out(edited_rules)
if formatting.confirm("Would you like to submit the rules. "
"Continue?"):
while True:
try:
rules = parse_rules(edited_rules)
if firewall_type == 'vlan':
mgr.edit_dedicated_fwl_rules(firewall_id, rules)
else:
mgr.edit_standard_fwl_rules(firewall_id, rules)
break
except (SoftLayer.SoftLayerError, ValueError) as error:
env.out("Unexpected error({%s})" % (error))
if formatting.confirm("Would you like to continue editing "
"the rules. Continue?"):
edited_rules = open_editor(content=edited_rules)
env.out(edited_rules)
if formatting.confirm("Would you like to submit the "
"rules. Continue?"):
continue
raise exceptions.CLIAbort('Aborted.')
raise exceptions.CLIAbort('Aborted.')
env.fout('Firewall updated!')
else:
raise exceptions.CLIAbort('Aborted.')
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